On Wed, Jun 13, 2007 at 08:48:43AM -0500, Ray Henry wrote: > > It could also be me reading it wrong. I had an issue trying to home > using a shared limit pin. The one axis I was homing was fine but all > the others would fault. No way around it after the ignore limit code > was made single axis. > > Long ago we found that motion stuttered during homing. Some sort of > pause in the motion while EMC looked at the home pin. If this is still > the case, it might cause the increased following error that was > observed. > > Ray
Ray I missed the last paragraph of Richard's message at the first reading, but down there he says that his switches disable the servo amp during the homing process, which causes a larger following error. The motion (decelerating to a stop after touching the switch) is commanded smoothly, but his machine can't track it well, because the amp is off, and the axis is coasting. Chris ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
